Honing stone holder



1966 D. D. DUESENBERG 3,264,789

HONING STONE HOLDER Filed Oct. 17, 1963 F/& 3

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ywfim win 1W ATTORNEYS United States Patent 3,264,789 HONING STONEHOLDER Denny D. Duesenherg, Grosse Ile, Mich, assignor to Ford MotorCompany, Dearlborn Mich, a corporation of Delaware Filed Oct. 17, 1963,Ser. No. 316,833 11 Claims. (Cl. 51204) This invention relates to novelholders for honing stones or abrading elements employed for the honingof the interior surfaces of previously formed holes or apertures. Inparticular, this invention relates to honing stone holders for use witha honing arbor or mandrel in the machining of cylindrical surfaces, suchas cylinder castings and the like.

A wide variety of rotary honing devices are known to the art whichretain a plurality of abrading elements circumferentially disposed inrelation to a central shaft, arbor or mandrel with positioning meansinterposed therebetween to move the abrading elements radially outwardto forcefully engage the workpiece upon which the same are rotated forhoning and to return such elements when desired to an inoperativeposition. Typical examples of such devices are those disclosed in US.Patents 1,850,847, 2,265,377, 2,419,136 and 2,799,127. This invention isconcerned with the immediate and expendable holders which retain theabrading elements and which in turn are detachably engaged by the arborand/ or its appurtenances.

The honing stones commercially available commonly have dimensionalvariances of as much as 0.005 inch. If the face of a stone is broughtinto contact with the workpiece without provision for such dimensionalvariances, a portion of the face must be worn down to admit of full facecontact with the workpiece. Honing under these conditions can impart anuneven taper to the bore.

One object of this invention is to provide a honing stone holder that isself-adjustable under normal honing pres sures so as to immediatelyprovide essentially full face contact of the abrading element with theworkpiece.

A second object of this invention is to provide a honing stone holder ofimproved design that will signal through wear the need for stonereplacement when the height of the abrading element has decreased to apredetermined minimum.

These, together with other objects, will become apparent from aconsideration of the accompanying drawings and from the followingdetailed description. In the drawings:

FIGURE 1 is a perspective view of an expendable stone holder designed inaccordance with this invention with an abrading element in placetherein;

FIGURE 2 is a sectional view taken along line 2--2 of FIGURE 1illustrating the relative positions of the lower surface of the abradingelement and the upper surface of the signal ledge;

FIGURE 3 is a bottom view of the holder shown in the previous figuresillustrating one embodiment of the pressure sensitive knurled surfacethrough which compensation is effected to offset dimensional variancesin the abrading element; and

FIGURE 4 is an end view of the holder taken along line 4-4 associatedwith FIGURE 1.

Referring now to the drawings there is shown an integrally formed stoneholder or shoe 11 which is substantially rectangular in configuration.Holder 11 has a knurled base 13 and a projecting lug, platform, or ledge15, the functions of which are hereinafter described in greater detail.Holder 11 is provided with a rectangular channel or cavity 17 in whichis seated an abrading element or stone 19. In a more positive sense, thestone 19 may be viewed as located within a thin walled incasementsupported by the body of the holder. The stone 19 is held within thecavity 17 by a suitable adhesive or by other means suitable to hold suchelement securely in position. Holder 11 in this embodiment is equippedwith engaging means including a plurality of lugs 21 and end slots orgrooves 23 whereby the holder is detachably secured to a honing arborand/ or its appurtenances. It will be understood by those skilled in theart that such engaging means as well as the shape and size of the holdercan be modified within the scope of this invention to meet theindividual requirements of the honing device for which its use isintended.

The holder 11 is formed of a suitable soft metal or alloy, e.g.,aluminum. In honing the walls of the incasement surrounding the sides ofthe stone 19 are abraded away with the stone and hence must be of amaterial that will not cut or otherwise mar the surface of theworkpiece. contiguous with the body member and the tops define anaperture through which the stone is inserted. In this embodiment theholder is of unitary construction and is formed, i.e., cast, machined,etc., such that the bottom surface of the cavity is located a shortdistance below the upper surface of the projecting ledge or platform 15.The ledge 15 is laterally disposed with relation to the incasement forthe stone and may be viewed as an extension of the central body member.Thus, the bottom of the stone 19 is seated this predetermined distancebelow the level of the upper surface of such ledge. As the stone is worndown to a level even with the upper surface of ledge 15, abrasion ofsuch surface is initiated. The resulting change of appearance in theupper surface of the ledge thus provides a visual sign that theexpenditure of the given stone is nearing completion. Since each holderof the set employed in the holding device can be of the same design,warning is available to the operator of the near exhaustion of the firststone of the set to be expended. The undesirabliity of continued honingafter one or more of the stones is exhausted is self-evident.

Referring now particularly to FIGURE 3, there is shown one embodiment ofthe knurled base 13 of the holder 11. In this embodiment the entire baseof the holder is serrated in a substantially V-shaped pattern. The type,pattern and size of the knurl can be varied in accordance with thepressure surface afforded by the hon ing device whereby the holder withits incased stone is forced against the workpiece. The seating isessentially permanent in that the serrated base is irrecoverablycompressible, i.e., does not return to original form when pressure isreleased.

To seat the stone in accordance with this invention the face of thestone is brought into contact with the workpiece or an equivalentsurface with the base of the holder securely held in normal honingalignment. Pressure at least as great as normal honing pressure isevenly applied to the base of the holder causing the knurled base of theholder to be flattened in proportion to the magnitude of the forces ofcompression at each point on the base. Hence, the depression of theknurl at any point is directly proportional to the height of stone inline with such point, height being measured along a line segmentextending from the center of the arbor to the workpiece surface. Similardimensional variances in the holder are likewise compensated for withthis seating.

Thus, one preferred embodiment of the holder may be viewed as having acentral body member resting upon a knurled base and having a sideopposite and parallel to the base which supports both the walls forincasing the stone and laterally disposed therefrom the wear signalprotrusion which is positioned slightly above the lower surface of thestone. In such embodiment the walls which provide lateral support forthe stone encompass a major por- The bottoms of the walls of theincasement are 3 tion or area of the side opposite the base while thewear signal area is significantly smaller.

The seating of the stone canbe effected either statically 1. Anexpendable holder for an abrading element of a honing device comprisingan integrally formed structure including a body member having anirrecove-rably compressible, knurled base and a side: opposite said basesupporting an incasement adapted to receive an abrading element, aidincasement defining an aperture oppositev said .base through which saidabrading element can be inserted into said incasement.

ably compressible, knurled base and a side opposite said I base having acavity opening opposite said base and adapted to receive andsubstantially incase thebottom'ofan abrading element, said base beingadapted to compensate for variances in the height of the several.portions of said element by equalizing through compression forcesexertedupon said base through said element when pres- I 20. 2. Anexpendable holder for an abrading element of'a honing device comprisingan integrally formed metalstnlcture including a body member having anirrecover sure is applied evenly to said base and said body mem her isforced against the bottom of said element.

3. An expendable holder for an abrading element of a 1 rotary. honingdevice comprising. an integrally formed 1' metal structure including abody member having .an;ir-

recoverably compressible serrated base and a side opposite a said baseadapted to receive and retain an abradingele,

ment, said base providing means for equalizing at a plu:

rality of points the combined height of s-aidholder and said element byadjusting said holder for variances in the: heightof said elementthrough compression of the corresponding portions of said base .to adegree directly proportional to forces applied to said base through said1 element.

4. An expendablef holder for an abrading element of a honing devicecomprisingan integrally formed-metal structure including a bodyv memberhaving an irrecoverably compressible serrated base and a sideopposite=and parallel to said base, said side opposite supporting athinwalled incasement adapted to receive an abrading element, said basebeing constructed and arrangedto be.

compressed in proportion to pressures'exertedupon said base along linesperpendicular to said base and saidside opposite thereby providing meansfor equalizing the com-, bined height of said holder and said element ata plu-v rality of separated points intermediate the boundaries thereoftocompensate for variance in height of said element.

5. A holder foran abrading element, of a rotary hon-v ing devicecomprising a structure including a body mem-v ber having a base and aside opposite said base, said.

side having a first and major area and a secondand minor area, saidmajor area supporting an incasement having walls constructed andarranged to receive an abradingelernent therebet-ween, said .wallshaving. bottoms.

contiguous with saidside .and tops defining an aperture.

through which an abrading element can be passedinto said incasement, theportion of said minor areafarthest removed from said base beingsitu'ateda greater distance from said base than said wall bottoms and alesserdistance than said wall tops, said portion being constructed andarranged to be abraded by contact with a workpiece when said holder isin operative alignment with said hon-. ing device and said abradingelementhas b6IlW0fI1I1IO- the level of said portion.

6. A holder for an abrading elementof a rotary'hon- 1 ing devicecomprising an integrally formed, unitary metal} structure including abody member having anzir-recoven.

ably comp essible, knurled base. and ,a side opposite said base,-saidside opposite. supporting an incasement and 5 a platform, saidincasementhaving; walls constructed .and arranged to receive an abradingelement therebetweem.

at leastone of said walls having a bottom contiguous with 4 said side;opposite and a top. defining. one side of anraper.

ture through which an-abrading element can be passed to contact and restupon said side opposite, said platform being laterally disposed inrelation to said incasement and spaced apart from said knurledbase agreater distance than said .wall bottom and .a lesser distance than saidwall top,-

7. An expendable holder for amabrading element of a rotary honing devicecomprising ;an integrally .formed,

substantially rectangular structure including. i a central body memberhaving apressure sensitive serrated base and a sidey'opposite .said,serratedgbase, an incasement adapted to, receive an abrading elementsupported by said body member. and encompassing a major portion of saidside, a minor portion of said sidesupporting a lug constructedandarranged to be abraded by-contact with a workpiece When said abradingelementhas been :worn to a predetermined level.

8.. A holder for' an abrading element. of a rotary honing. devicecomprising an integrally 1 formed structure including a body! portionhaving an irrecoverably .com-

pressible,.knur,led base and an opposite side spaced apart therefrom,saidfopposite side. having a first:surface and a second .su rface,.said.second surfacesupporting one end of incasementvwalls the. opposite endsof whichidefine an apertureadapted to admit an ;abrading element betweensaid walls to seat upon .said firstsurface, said second surface being:spaced apart from .said knurled sidei-a distance greaterv than. saidfirst .surface and a lesser distance. than said oppositeends of .saidincasement Walls, said knurled base. being :adapted, to equalizethrough; compression forces. exerted..upon .said base through saidabrading element:

9. A component of a honing device, comprising in combination a holderfor an abrading element and an abradin'gelement seated therein, saidholderhavin'g a base and a side opposite, said base, said ,side oppositehaving amajor surface area adaptedto, support said abrading ele: mentand a minor surfacearea adapted to serve as a wear indicator, said majorsurface .area substantially en-v compassed by incasementwallsextendingjtherefrom and adapted to receive and retain therebetweensaidabrad- L ing element with saidabrading; element seated upon said majorsurfacearea,v said minor: surface area being constructed and arrangedtobe abraded by a workpiece after an abrading, element seated upon saidmajor surface area is worn to :a predetermined level, said minor surfacearea being spaced apart-from saidbase a distance greater than the.shortestdistance between said-base and said abrading element and alesser distance than. a major portion of said abrading element.

10. A component: of a honingdevice comprisingin combinationaa holder foran abrading elementv and an abrading element seated thereinpsaid holderhaving .an irrecoverably tompressible baseand v.a side opposite said Ibase, said sidev opposite having a'major surface area adapted to supportsaid abrading element and a minor surface area adaptedto=serve as a wearindicator, said i ma or surface .area substantilly encompassed by.in'casement walls extending therefirom-and adapted to receive andretain therebetween said abrading element with" said abrading elementseated upon. said. major'surfa'cearea,

saidminor surface .area being constructed and arranged to'be abraded .bya workpiece after an abrading element seated upon said-major surfaceareais worn to a pre-;- determinedilevel, said minor surface. area beingspaced.

apartfromsaid base a distance greater thanthe shortest distance betweensaid base and said abrading element and support for an abrading elementwhen said element is a lesser distance than a major portion of saidabrading p iti n gain t id first s rface. element.

11. A holder for an abrading element comprising a References C'ted bythe Examiner structure having an irrecoverably compressible base, aUNITED STATES PATENTS camrfil Sf member p P3 Said tilai is com 2 952 9529 19 stanhope 5 2 4 presslon resistant relative to sald base, andlncasement 3,037,333 6/ 1962 Stelmaohowski 5l-204 means supported bysald body member, sa1d base being FOREIGN PATENTS positioned on a firstside of said body member, said body member having a first surface on asecond side thereof opposite said base for receiving an abradingelement, said inczfisernegtfirneans substantially encompasdsirgg saidfirst ROBERT C. RIORDON Primary Examiner sur ace, e ning an apertureopposite sal ase portion through which an abrading element can beadmitted to 15 LESTER Q Examu'ler' said first surface, and being adaptedto provide lateral SELMAN, Asslsmnl Examiner- 10 22,396 11/1894 GreatBritain.

11. A HOLDER FOR AN ABRADING ELEMENT COMPRISING A STRUCTURE HAVING ANIRRECOVERABLY COMPRESSIBLE BASE, A CENTRAL BODY MEMBER SUPPORTED BY SAIDBASE THAT IS COMPRESSION RESISTANT RELATIVE TO SAID BASE, AND INCASEMENTMEANS SUPPORTED BY SAID BODY MEMBER, SAID BASE BEING POSITIONED ON AFIRST SIDE OF SAID BODY MEMBER, SAID BODY MEMBER HAVING A FIRST SURFACEON A SECOND SIDE THEREOF OPPOSITE SAID BASE FOR RECEIVING AN ABRADINGELEMENT, SAID INCASEMENT MEANS SUBSTANTIALLY ENCOMPASING SAID FIRSTSURFACE, DEFINING AN APERTURE OPPOSITE SAID BASE PORTION THROUGH WHICHAN ABRADING ELEMENT CAN BE ADMITTED TO SAID FIRST SURFACE, AND BEINGADAPTED TO PROVIDE LATERAL SUPPORT FOR AN ABRADING ELEMENT WHEN SAIDELEMENT IS POSITIONED AGAINST SAID FIRST SURFACE.